what was the reason for the "make clear to the NMB our continued....." statement?

The letter was fine without the last paragraph.

What purpose did it serve? There MUST be a reason for it.

BTW, the CAL Ast. Chief Pilots have been telling line pilots that those items not agreed upon will be "parked" in a "parking lot" and those items will be going to arbitration. Could it be that the last paragraph lends credence to and supports the CPO tidbits they've been feeding us??